package com.ns.school.common.filter;

import com.ns.school.common.utils.StrUtil;
import org.springframework.http.MediaType;

import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import java.io.IOException;

/**
 * Repeatable 过滤器
 *
 * @author Spark
 */
public class RepeatableFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        ServletRequest requestWrapper = null;
        if (request instanceof HttpServletRequest) {
            String contentType = request.getContentType();
            if (contentType != null && StrUtil.startWithIgnoreCase(contentType,MediaType.APPLICATION_JSON_VALUE)) {
                requestWrapper = new RepeatedlyRequest((HttpServletRequest) request, response);
            }
        }
        if (null == requestWrapper) {
            chain.doFilter(request, response);
        } else {
            chain.doFilter(requestWrapper, response);
        }
    }

    @Override
    public void destroy() {
    }
}
